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Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.

2015 Mercedes C-Class owners reporting bleeding seats [UPDATE]

UPDATE: Daimler AG became aware that, in a small number of individual cases, it is possible for temporary spots and/or shiny patches to form on the man-made leather surfaces of the 2015 C-Class in sub-freezing temperatures. No accidents or injuries have been reported, and we have no reason to believe that there are any hazards to customers. Replacement parts are expected to start shipping to dealers by next week. Owners of the 2015 Mercedes-Benz C-Class are learning the hard way that you don't necessarily want to buy a new vehicle in its first model year. Besides reports of poorly fitting taillights and faulty infotainment touchpads, a number of reports are popping up on the forums of MBWorld.org claiming that the compact luxury sedan's seats are, for lack of a better term, bleeding. Owners of US-built, 2015 C-Classes fitted with MB Tex vinyl interiors are reporting a white, oily, shiny residue discoloring their seats that shows up, often after cold cars are quickly heated. It's important to note that this residue is not necessarily staining the seats permanently – warm, soapy water is often all that's needed to restore the original finish. In other cases, the residue disappears of its own accord, only to reappear in an entirely different pattern. That doesn't make things any more acceptable to owners, many of whom have reached out to Mercedes with complaints. It's not clear how many vehicles are affected, but there are a sizable number of forum threads on the issue on MBWorld alone, and the problem is prevalent enough that Mercedes has issued a technical service bulletin to its dealers. According to the forum postings, the TSB instructs service technicians to replace the headrest and seat cover (except for the front, passenger-side seat bottom because of "factory calibration issues") in affected customer vehicles. New C-Class models in dealer inventories, meanwhile, are to get the soapy water treatment if they're showing signs of the residue. Neither one of those moves seems to represent a long-term fix, though. Black MB Tex seats – both the standard and sport variety – seem to be particularly susceptible to the residue, although we stumbled across at least one image of what looks like Silk Beige MB Tex with speckles of residue.

Pre-Race notes from the 2015 Nurburgring 24-Hours

Autoblog has come to the German countryside to watch the Nurburgring 24-Hour race, and just one day in, we have to say it's outstanding. Le Mans has been the highlight of our summer racing schedule for the past few years, the 'Ring 24-Hour event being the appetizer we always skipped. Earlier this year, however, while visiting Miami to check out the Cigarette Racing 50 Marauder GT S, we met Scott Preacher. He oversees digital marketing for both Cigarette and AMG during the week, then comes to Germany to compete in the VLN race series on the weekends, driving an Aston Martin Vantage GT4 for Team Mathol. If Le Mans is the Oscars of endurance racing, the Nurburgring 24-Hour race is the Screen Actors Guild award – the one voted on by the actors, for the actors. In this case it's the race by the teams and fans, for the teams and fans, even though the increasing manufacturer presence has altered the team equation. We were told that it wasn't so long ago that true privateers could win the overall, but that's not really the case anymore. Front-running teams have heavy factory involvement – Audi Sport Team Phoenix, for instance, which finished in first and third last year, has its own 'Ring race center and is running the 2016 R8; Aston Martin is represented by Aston Martin Racing and Aston Martin Test Center, and Bentley has a Bentley Motors team and uses HPT to run another team. The fan component hasn't changed, though, and you can't talk about the race for more than 60 seconds before someone brings up the battalions of spectators. Every driver we spoke to cited them as the most incredible part of this race after the track itself. It feels to us like a giant German Sebring, with thousands of people camped out in the ginormous, forested infield, many of whom have been here since Monday erecting their ornate camping compounds. There will be parties everywhere Saturday night, and so much bratwurst on the grill that the drivers can smell it when as they're blasting full speed through Wehrseifen. Even when we drove a Mercedes S63 AMG Coupe on a lap before the race, the fans waved like it was a competition. Scott Preacher's Australian co-driver Robert Thompson said, "You come around a corner and it's like you're driving full speed through the middle of a carnival." The race field itself could also be called a carnival, with an officially invited field of more than 170 cars. Even on a track that's 24.4-km long, that's like racing on the 405 at midday.